> For the complete documentation index, see [llms.txt](https://ai-os-and-trend-finder.gitbook.io/ai-os-and-trend-finder-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ai-os-and-trend-finder.gitbook.io/ai-os-and-trend-finder-docs/.spec_system/archive/sessions/phase29-session07-per-stage-validation-narration/implementation-notes.md). # Implementation Notes **Session ID**: `phase29-session07-per-stage-validation-narration` **Started**: 2026-06-20 22:07 **Last Updated**: 2026-06-20 22:29 *** ## Session Progress | Metric | Value | | ------------------- | ------- | | Tasks Completed | 20 / 20 | | Estimated Remaining | 0 hours | | Blockers | 0 | *** ## Task Log ### 2026-06-20 - Session Start **Environment verified**: * [x] Prerequisites confirmed * [x] Tools available * [x] Directory structure ready *** ### Task T001 - Verify analyzer state, prerequisites, and stub scope **Started**: 2026-06-20 22:06 **Completed**: 2026-06-20 22:07 **Duration**: 1 minute **Notes**: * Ran the spec-system analyzer and confirmed current session `phase29-session07-per-stage-validation-narration`. * Confirmed Session 07 PRD stub scope matches the implementation spec and Phase 29 prerequisite state. * Verified environment prerequisites passed with local spec-system scripts. **Files Changed**: * `.spec_system/specs/phase29-session07-per-stage-validation-narration/implementation-notes.md` - Created implementation progress log. *** ### Task T002 - Inspect collector, trace, model, and view contracts **Started**: 2026-06-20 22:07 **Completed**: 2026-06-20 22:07 **Duration**: 1 minute **Notes**: * Reviewed collector enrichment paths for AI analysis, source breakdowns, run narratives, and outlier ideas. * Reviewed script-side trace sanitization, browser trace parsing, Engine Replay model projection, view layout, fixtures, and existing tests. * Confirmed the session produces application code, so the Behavioral Quality Checklist applies. **Files Changed**: * `.spec_system/specs/phase29-session07-per-stage-validation-narration/implementation-notes.md` - Logged setup inspection work. *** ### Task T003 - Create stage-validation helper contract **Started**: 2026-06-20 22:08 **Completed**: 2026-06-20 22:08 **Duration**: 1 minute **Notes**: * Added bounded stage IDs, statuses, issue codes, degradation paths, retry count clamping, and message sanitization. * Created explicit accepted/degraded result helpers so callers can narrate thrown failures and intentional degraded outputs. * Included abort-signal handling and retry-limit ownership in the helper for the later wrapper task. **Files Changed**: * `scripts/extensions/trend-finder/stage-validation.ts` - Created stage validation contract and helper primitives. **BQC Fixes**: * External dependency resilience: The wrapper retries at most once and degrades deterministically after failure. * Error information boundaries: Stage messages are sanitized and fallback to generic text on unsafe values. *** ### Task T004 - Add browser trace stage narration schema **Started**: 2026-06-20 22:08 **Completed**: 2026-06-20 22:09 **Duration**: 1 minute **Notes**: * Added `stageNarrations` as an additive Engine Trace field with defaults for legacy payloads. * Added stage ID, status, issue code, and degradation path enums with strict Zod parsing. * Sorted and capped parsed rows deterministically. **Files Changed**: * `src/extensions/trend-finder/engine-trace.ts` - Added browser-safe stage narration schema and defaults. **BQC Fixes**: * Contract alignment: Legacy payloads parse with `stageNarrations: []`. * Error information boundaries: Stage messages reject private paths, prompts, tokens, request IDs, and stack traces. *** ### Task T005 - Add script-side trace event mapping **Started**: 2026-06-20 22:09 **Completed**: 2026-06-20 22:09 **Duration**: 1 minute **Notes**: * Added `stage-validation.recorded` to the Trend Finder trace allowlist. * Mapped stage narration records through strict enum normalization, output caps, deterministic ordering, and unsafe key/value rejection. **Files Changed**: * `scripts/extensions/trend-finder/engine-trace.ts` - Added stage narration event mapping into sanitized Engine Trace output. **BQC Fixes**: * Error information boundaries: Entire narration events are dropped if any unsafe diagnostic key or value is present. * Contract alignment: Script output now matches the browser parser contract. *** ### Task T006 - Prepare Engine Replay model projection **Started**: 2026-06-20 22:09 **Completed**: 2026-06-20 22:10 **Duration**: 1 minute **Notes**: * Added stage narration view models with stage, status, issue, retry, degradation, tone, and accessible labels. * Legacy traces with no `stageNarrations` project as an empty list. * Offline traces tone narration rows as warning without exposing raw extension warning text. **Files Changed**: * `src/extensions/trend-finder/engine-replay-model.ts` - Added stage narration projection and labels. **BQC Fixes**: * Accessibility and platform compliance: Each projected row includes a complete `ariaLabel`. * Error information boundaries: Messages are re-sanitized at model projection time before display. *** ### Task T007 - Prepare fixtures and payload reporting **Started**: 2026-06-20 22:10 **Completed**: 2026-06-20 22:11 **Duration**: 1 minute **Notes**: * Added fixture trace rows for accepted, degraded, retry-once, and unsafe-dropped narration states. * Kept legacy coverage through default empty `stageNarrations` parsing. * Added `data.engineTrace.stageNarrations` to the always-visible payload-size report branches. **Files Changed**: * `src/extensions/trend-finder/fixtures.ts` - Added fixture stage narration rows. * `scripts/extensions/trend-finder/measure-payload-size.ts` - Added stage narration branch to payload reporting. **BQC Fixes**: * Contract alignment: Fixture rows exercise each public enum family and preserve the legacy empty default. *** ### Task T008 - Implement retry-once-then-degrade wrapper **Started**: 2026-06-20 22:11 **Completed**: 2026-06-20 22:12 **Duration**: 1 minute **Notes**: * Implemented a generic wrapper that retries failed or retryable degraded stages at most once. * Added abort-signal checks before each attempt and before retry. * Added deterministic degradation through caller-provided fallback functions. **Files Changed**: * `scripts/extensions/trend-finder/stage-validation.ts` - Added retry-once wrapper and outcome narration construction. **BQC Fixes**: * External dependency resilience: Retry count is capped by construction and no unbounded loop is possible. * Failure path completeness: Every thrown or degraded stage returns a visible narration record plus fallback value. * State freshness on re-entry: Each call owns local retry state and does not share mutable state across runs. *** ### Task T009 - Wrap AI-analysis result handling **Started**: 2026-06-20 22:12 **Completed**: 2026-06-20 22:13 **Duration**: 1 minute **Notes**: * Wrapped the existing analyst call with stage validation without changing the input contract. * Explicit `fallback-required` analyst results now narrate deterministic fallback without an extra retry. * Thrown analyst failures retry once, then preserve the existing deterministic scoring fallback semantics. **Files Changed**: * `scripts/extensions/trend-finder/collector.ts` - Added AI-analysis stage validation narration. **BQC Fixes**: * Duplicate action prevention: Retry is capped to a single wrapper-owned retry. * Error information boundaries: Failure warnings now use stable generic text rather than raw exception text. *** ### Task T010 - Wrap source-breakdown derivation **Started**: 2026-06-20 22:13 **Completed**: 2026-06-20 22:14 **Duration**: 1 minute **Notes**: * Wrapped source-breakdown derivation with retry-once stage validation. * Preserved the existing deterministic fallback by keeping scored topics when source breakdowns fail. * Emitted safe stage narration and stable warning data on degradation. **Files Changed**: * `scripts/extensions/trend-finder/collector.ts` - Added source-breakdown stage validation narration. **BQC Fixes**: * Failure path completeness: Degraded source-breakdown output is now visible in Engine Replay instead of only a generic warning. * Error information boundaries: The trace event carries issue code and retry count rather than raw exceptions. *** ### Task T011 - Wrap run narrative and outlier idea enrichment **Started**: 2026-06-20 22:14 **Completed**: 2026-06-20 22:15 **Duration**: 1 minute **Notes**: * Wrapped run narrative generation with retry-once validation and an empty-narratives fallback. * Wrapped outlier idea enrichment with retry-once validation and evidence-preserved fallback output. * Added degraded-only warnings so accepted stages do not add duplicate user-visible noise. **Files Changed**: * `scripts/extensions/trend-finder/collector.ts` - Added run narrative and outlier idea stage validation narration. **BQC Fixes**: * Failure path completeness: Optional enrichment failures now return explicit degraded state and deterministic output. * Duplicate action prevention: Each optional enrichment path uses one bounded retry and only adds warnings on degradation. *** ### Task T012 - Emit stage-validation trace events **Started**: 2026-06-20 22:15 **Completed**: 2026-06-20 22:16 **Duration**: 1 minute **Notes**: * Added one collector-local trace emitter for stage validation records. * Confirmed AI analysis, source breakdown, run narratives, and outlier ideas all emit `stage-validation.recorded`. * Accepted rows use `info`; degraded rows use `warn`. **Files Changed**: * `scripts/extensions/trend-finder/collector.ts` - Added stage validation trace emission across wrapped stages. **BQC Fixes**: * Contract alignment: All emitted records use the shared helper narration contract. * Error information boundaries: Emitted rows contain only enum fields, retry count, degradation path, and sanitized message text. *** ### Task T013 - Map narration records into browser-safe output **Started**: 2026-06-20 22:16 **Completed**: 2026-06-20 22:17 **Duration**: 1 minute **Notes**: * Mapped `stage-validation.recorded` records into `engineTrace.stageNarrations`. * Capped rows to 12 and sorted rows by known stage order. * Rejected events containing unsafe keys or values before output. **Files Changed**: * `scripts/extensions/trend-finder/engine-trace.ts` - Added sanitized stage narration output mapper. **BQC Fixes**: * Error information boundaries: Unsafe sentinel keys or values drop the entire row. * Contract alignment: Sanitized output feeds the browser parser with the exact additive field shape. *** ### Task T014 - Project narration rows into Engine Replay models **Started**: 2026-06-20 22:17 **Completed**: 2026-06-20 22:18 **Duration**: 1 minute **Notes**: * Added view-model rows with status, issue, retry, degradation, message, tone, and accessible labels. * Preserved empty legacy state as an empty `stageNarrations` list. **Files Changed**: * `src/extensions/trend-finder/engine-replay-model.ts` - Added stage narration projection. **BQC Fixes**: * Accessibility and platform compliance: Each row carries an `ariaLabel` for screen reader context. * Error information boundaries: Display messages are sanitized again before model output. *** ### Task T015 - Render compact stage validation notices **Started**: 2026-06-20 22:18 **Completed**: 2026-06-20 22:19 **Duration**: 1 minute **Notes**: * Added a compact Engine Replay stage validation section above the replay grid. * The section is hidden when legacy or empty traces have no narration rows. * Each row displays stage, status, retry label, issue label, degradation path, and sanitized message. **Files Changed**: * `src/extensions/trend-finder/views/engine-replay-view.tsx` - Added stage validation notice rendering. **BQC Fixes**: * Accessibility and platform compliance: Rows expose complete accessible labels and do not depend on hover-only text. * State freshness on re-entry: Empty legacy payloads render no stale stage validation rows. *** ### Task T016 - Document stage narration behavior **Started**: 2026-06-20 22:19 **Completed**: 2026-06-20 22:20 **Duration**: 1 minute **Notes**: * Documented the implemented stage validation narration behavior. * Recorded the safe browser-visible fields and retained privacy boundary. * Kept the documentation limited to behavior shipped in this session. **Files Changed**: * `docs/extensions/trend-finder-pipeline.md` - Added stage validation narration section. **BQC Fixes**: * Error information boundaries: Documentation explicitly states that raw model output, prompts, provider responses, request IDs, tokens, stack traces, local paths, and private diagnostics remain excluded. *** ### Task T017 - Add stage-validation helper tests **Started**: 2026-06-20 22:20 **Completed**: 2026-06-20 22:21 **Duration**: 1 minute **Notes**: * Added helper tests for first-try success, retry success, retry failure, explicit degraded output, abort handling, retry clamping, and unsafe message stripping. **Files Changed**: * `scripts/extensions/trend-finder/__tests__/stage-validation.test.ts` - Added stage-validation helper tests. **BQC Fixes**: * External dependency resilience: Tests prove the retry limit cannot exceed one retry. * Failure path completeness: Tests cover thrown failures, explicit degradation, and aborted signal behavior. *** ### Task T018 - Add collector and engine-trace tests **Started**: 2026-06-20 22:21 **Completed**: 2026-06-20 22:22 **Duration**: 1 minute **Notes**: * Added engine-trace tests for stage narration caps, retry count clamping, unsafe row rejection, and legacy empty defaults. * Added collector coverage for thrown AI analysis retry-once behavior, degraded narration, deterministic fallback preservation, and private sentinel exclusion. **Files Changed**: * `scripts/extensions/trend-finder/__tests__/engine-trace.test.ts` - Added stage narration sanitizer tests. * `scripts/extensions/trend-finder/__tests__/collector.test.ts` - Added forced AI analysis failure narration test. **BQC Fixes**: * Failure path completeness: Tests verify thrown AI analysis remains visible as degraded stage narration. * Error information boundaries: Tests assert private path and request sentinels do not reach serialized trace output. *** ### Task T019 - Add Engine Replay model/view tests **Started**: 2026-06-20 22:22 **Completed**: 2026-06-20 22:23 **Duration**: 1 minute **Notes**: * Added tests for degraded stage narration model projection and visible Engine Replay rendering. * Added legacy empty and offline tone coverage. * Asserted accessible labels and private sentinel exclusion in rendered output. **Files Changed**: * `src/lib/__tests__/trend-finder-engine-replay.test.tsx` - Added stage narration replay tests. **BQC Fixes**: * Accessibility and platform compliance: Tests verify accessible row labels are present. * State freshness on re-entry: Tests verify legacy traces with no narration rows do not render stale notices. * Error information boundaries: Tests verify private path and request sentinels do not render. *** ### Task T020 - Run focused validation checks **Started**: 2026-06-20 22:23 **Completed**: 2026-06-20 22:29 **Duration**: 6 minutes **Notes**: * Ran focused script-side tests for stage validation, engine trace, and collector behavior. * Ran focused Engine Replay model/view tests through the project Vitest command. * Ran script and app typechecks, payload-size check, private-runtime scan, ASCII scan, and targeted Prettier check. * Fixed validation issues found during the first pass: TypeScript runtime narrowing, stage-event unsafe key handling, and two test expectations affected by the new visible stage validation rows. **Files Changed**: * `.spec_system/specs/phase29-session07-per-stage-validation-narration/tasks.md` - Marked all tasks and completion checklist complete. * `.spec_system/specs/phase29-session07-per-stage-validation-narration/implementation-notes.md` - Logged final validation evidence. **Validation Evidence**: * `bun test ./scripts/extensions/trend-finder/__tests__/stage-validation.test.ts ./scripts/extensions/trend-finder/__tests__/engine-trace.test.ts ./scripts/extensions/trend-finder/__tests__/collector.test.ts` - 48 pass, 0 fail. * `bun run test -- src/lib/__tests__/trend-finder-engine-replay.test.tsx` - 22 pass, 0 fail. * `bun run typecheck:scripts && bun run typecheck` - Passed. * `bun run scripts/extensions/trend-finder/measure-payload-size.ts src/data/live-data.example.json --threshold-kb=0 --json` - Trend Finder data payload 14,138 bytes, below 1,048,576-byte boundary. * `bun run runtime:check-private` - Passed. * ASCII scan over touched files - Passed. * Targeted `bunx prettier --check` over touched files - Passed. **BQC Fixes**: * Contract alignment: Validation caught and fixed the stage-event sanitizer conflict with public `stageId` fields. * Error information boundaries: Final tests assert private request/path sentinels are excluded from trace and UI output. *** --- # Agent Instructions This documentation is published with GitBook. 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